Thill-coupling



(No Model.)

G. W. BLAIR.

THILL COUPLING.

No. 385,676. Patented Feb. 9, 1886.

" UNiTED dramas Price.

GEORGE IV. BLAIR, OF WABASH, INDIANA.

THlLL-COUPLING.

SPECIFICATION forming part of Letters Patent No. 335,676, dated February9, 1886.

Application filed June 12, 1885. Serial No. 168,482. (No modchi T aZZwhom it may concern:

Be it known that I, GEORGE W. BLAIR, of.

\Vabash, in the county of Wabash, in the State of Indiana, have inventedcertain new and useful Improvements upon Thill or Pole Coupling Springs,of which the following is a specification. v

In the drawings, Figure 1 represents the spring detached; Fig. 2, thesame with rub her block inserted; Fig. 3, device to prevent the springfrom working up out of place; Fig. 4, the spring in place.

This invention consists in the construction of the spring,or rather theshape of the spring, as a spring to prevent rattling has been usedheretofore.

It further consists in combining a bolt with the spring and shackle inorder to hold the spring down into its place.

A is the axle. Around it is the clip B. The clip has two forwardprojecting ears, 00. Between these ears the metallic eye D is pivoted bythe bolt E, as shown.

F is the spring, or the subject-matter of the invention, and to preventthe rattling of the parts it is inserted between the eye and the clip.The top of this spring is re-enforced with a piece of metal, a, fastenedin a substantial manner, and its use is to prevent injury to the springwhen it is being driven into place by the blows of a hammer on the topof the spring. Both top ends are at the top of the shackle. The shapeofthe spring renders it a very small and compact article. Itis put 3, 5in place without taking out the shafts, which saves lunchtime and labor.In order to do this the smallest part of the spring is at the bottom.The curve is also made entirely at the bot tom. By this form ofconstruction the spring may be easily inserted in place, from the factthat it has the shape of the shaft-eye, that the rear of the spring fora portion of its length is fiat, and thenhasa gradual curve in order tothrow the lower part underneath the shaft-eye, and to the front and pastthe ordi nary tie-bar which holds the shackle in position. Other pendentanti-rattlers have at the front only a bearing atthe top of theshaft-eye, and therefore have not sufficient lifting-power to preventthe rattling of the shafts.

The spring or anti-rattler has an inclination to Work up out of place.To overcome this tendency, a hole is made in the center of the topplate, a, through which is put the bolt 1), having a screw-thread on itabove the plate, so as to receive the nut 0. Near the other end of thebolt is a hole, and through it is inserted the round bar (I. WVhen thespring has been put down into place,the bar is inserted the bolt. Thenut is then tightened, which draws the bar up against the ears upon theclip.

Other devices for screwing through the antirattler were for the purposeof tightening it so it would overcome the wear of the shaft-eye; butthis device is not for that purpose, as the steel spring has initselt'suflicient elasticity to overcome the wear and tear. It willaccommodate itself and take up lost motion. The wear upon a shaft-eyethat causes the rattling is at the upper side of the hole of theshafteye through which the bolt extends to hold the shaft-eyein theshackle. To overcome the rattle, it is necessary to hold the shaft-eyeup and off of the bolt, so that when the jar comes it comes upon thespring and not upon the bolt. Now, the push on the front of this springmakes a draw on the rear, and so makes it a carrier. A rubber block, G,is shown inserted in the spring. Its effect is to form a cushion withinthe casing orouterleaves of the spring. It rubber be used alone,itcauses too much friction, and does not allow the shaft-eye to movefreely. Again, the rubber soon becomes cut and worthless from theup-and-down motion of the shaft; but placing the rubber between theleaves of the spring it retains its elasticity.

I olaim The spring F of two leaves made smallest at the bottom and wit-hits bottom portion curved to the front, re-enforced by the strip a, andadapted to receive the rubber block G or the clamping device I) c d,substantially as described.

In testimony whereofI affix my signature, in presence of twowitnesses,this 30th day of May,

GEORGE W. BLAIR.

Witnesses:

GEORGE I. HERRICK, J AMES I. HILL,

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